USCG USCG Motor
Set 5 • Question #254 of 382
Launch Interactive Practice Room Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the____.
A
main bearings
B
connecting rod bearings
C
piston pin bushings
D
All of the above
✓ Correct Answer
USCG NMC Regulatory Explanation
Crankshaft deflection readings (measured between crankweb punch marks at bottom, port, top, and starboard) verify engine bedplate alignment, foundation chocking integrity, and main bearing wear.
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